Journal article

Efficient implementation of the continuous-time hybridization expansion quantum impurity solver

  • Hafermann, Hartmut École Polytechnique, CNRS, Palaiseau, France
  • Werner, Philipp Department of Physics, University of Fribourg, Switzerland
  • Gull, Emanuel University of Michigan, Ann Arbor, USA - Max Planck Institut für die Physik komplexer Systeme, Dresden, Germany
    19.12.2012
Published in:
  • Computer Physics Communications. - 2013, vol. 184, no. 4, p. 1280–1286
English Strongly correlated quantum impurity problems appear in a wide variety of contexts ranging from nanoscience and surface physics to material science and the theory of strongly correlated lattice models, where they appear as auxiliary systems within dynamical mean-field theory. Accurate and unbiased solutions must usually be obtained numerically, and continuous-time quantum Monte Carlo algorithms, a family of algorithms based on the stochastic sampling of partition function expansions, perform well for such systems. With the present paper we provide an efficient and generic implementation of the hybridization expansion quantum impurity solver, based on the segment representation. We provide a complete implementation featuring most of the recently developed extensions and optimizations. Our implementation allows one to treat retarded interactions and provides generalized measurement routines based on improved estimators for the self-energy and for vertex functions. The solver is embedded in the ALPS-DMFT application package.
Faculty
Faculté des sciences et de médecine
Department
Département de Physique
Language
  • English
Classification
Physics
License
License undefined
Identifiers
Persistent URL
https://folia.unifr.ch/unifr/documents/302783
Statistics

Document views: 7 File downloads:
  • wer_eic.pdf: 14